Not the poster of the comment but I'd like to hear from the downvoter why this was downvoted.
As a Rust novice, interpreting the comment GP made (from the perspective of, for example, C++ calling Safe Rust core or stdlib) this seems like a valid response.
It aims to expose a nicer way to glue rust idioms to similar or equivalent idioms in other languages.
https://github.com/rust-lang/rust/pull/105586